scaffolded AddAdmin-CompilerPass
added basics for AdminPool
configured route and controller
registered something in the AdminPool
registered services with tag
implemented navigation classes
added navigation
tested navigation item
written tests for merging navigation
implemented merging of two navigations
wrote tests for NavigationItem iterator
implemented NavigationItem iterator
reformated code
reviewed source code
added licensing information and head comments
replaced double with single quotes
adjusted routing
removed debugging information from controller
created AdminController
implemented toArray and hasChildren for Navigation